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An …………. Telescope is used to view heave...

An …………. Telescope is used to view heavenly bodies like strars , planets galaxies and satellites

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Explore conceptually related problems

To view heavenly objects like stars, _________ is used

Assertion : Astronomical telescope is used to view heavenly bodies. Reason : Telescope is easily protable.

Terrestrial telescope is used to view objects ___________ .

To study the dimensions of heavenly bodies __________ law is used .

A small telescope has an objective lens of focal length 150 cm and eyepiece of focal length 5 cm. What is the magnifying power of the telescope for viewing distant object in normal adjustment? If this telescope is used to view a 100 m tall Also tower 3 km away, what is the height of the image of the tower formed by the objective lens?

Focal length of the Objective lens is 140 cm. Focal length of the eyepiece is 5cm. If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens ?

b. If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens ? the diameter of the moon is 3.48 xx 10^(6) m , and the radius of lunar orbit is 3.8 xx10^(8) m.

Assertion: A planet is a heavenly body revolving around the sun. Reason: Star is a self-luminous body made up of gaseous material. Select the correct statement from the following statements.

FULL MARKS-OPTICS-ADDITIONAL QUESTIONS (II. Fill in the blanks)
  1. The interacting particles of the medium is called as .

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  2. When white light pass through transparent medium, it is split into col...

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  3. The speed of light in a medium is high if the refractive index of the...

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  4. The spectral lines which are having frequences other than the incident...

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  5. ……… lenses are used to correct the defect of vision called hypermetero...

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  6. lenses are used as eye lens of 'Galilean Telescope'

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  7. By convention , the power of a convex lens is taken as ………… whereas th...

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  8. The diameter of eye ball in our eye is .

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  9. ……………. Is achieved by changing the focal length of the lens with the h...

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  10. is the coloured portion of the eye.

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  11. …………… is used to observe parts of flower , insects and finger prints i...

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  12. A microscope works based on the principle of vernier.

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  13. An …………. Telescope is used to view heavenly bodies like strars , plane...

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  14. is an optical instrument used to see distant objects.

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  15. ……….. Is the most sensitive part of human eye.

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  16. A convex lens is ……… in the miiddle than at edges

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  17. ……. Lens produces mostly real images.

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  18. Unit of power is .

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  19. The amount of scattering of light is inversely proportional to the po...

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  20. The refractive index of a medium is dependent on the .

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